Phonograph sound-regulator



H. C. STAGEMAN.

PHONOGRAPH SOUND REGULATOR..

APPLICATION FILED MAR.15.1920.

1,389,605, l Pmntedsept. 6, 1921.

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Harry C. Sayelna/L,

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^ l clarifyin HARRY C. SGEMAN, 0F COUNCIL BLUFFS, IOWA.

PHONOGRPH. SOUND-REGULATOR.

Specification of Letters Patent.

A Patented Sept. 6, 1,921.

`Application led March 15, 1920s. Serial No. 365,881.

To aZZ whom t concern.'

Be it known that I, HARRY C. STAGEMAN,

-a citizen of the United States, residing at Council Bluffs, county of Pottawattamie, and State of Iowa, have inventedn a new and useful Phonograph Sound-Regulator, of which the following is a specification.

y invention relates to improvements in phonograph sound regulators. in which a chamber is employed with one or more lntensifiers and the objects' of my` improvement are:

1. To soften the tones produced in the phonograph horn and successively intensify the same; 2. To produce such a device in which the parts are easily applied 'to the ordinary phonograph horn of whatever form.

I attain these objects by the structure in the accompanying drawing in which Figure l is a diagrammatic section of a phonograph horn showing sections of the clarifier and a l succession of intensifiers; Fig. 2 is a side elevation of the clarifier, and Fig. 3, eleva'- tion's respectively of the perforated diaphragms separating the chambers of the clarifier.

Similar letters refer to similar parts throughout the several views.

r represents a record resting upon the revolving-table of the ordinary phonograph.

The 'needle n, communicateswith the reproduclng head f, having the reproducing diaphragm s, attached to the reproducing head j", on the ordinary horn of the phonograph'A ZL. l

The clarifier c 'consists of a succession of two or more chambers, b, b and 1),divided from each other and from the anterior'and posterior chambers of the horn by perforated diaphragms, d, e, d and e. These diaphragms are arran ed with perforations which alternate in t e clarifier so that the sound wavesin the lair space in each chamber b, Z2 and b are more or less broken in each chamber. Fig. 3, illustrates the p0- sition of the perforations in the diaphragms Z and d', and Fig. 4, represents the rlativ;

ne o

as d, is extended to form a support and fit the phonopragh horn at suitable distance from the reproducing diaphragme, of the phonograph. l

y invention relates' to instrumentalities applied to the ordinary phonograph to produce sound regulations for first clarifying and then intensifying the sounds produced b the Ordinar hono ra h. yThe intensifiierp g p perforated head gor g. Attached to the perforated head g or g is a suspended diaphragm z' or z", and attached to the diaphragm z or i is a spring n or n upon which is suspended or to which is attached a suitable auxiliary horn k or lo', which docs phonograph, ex

not touch any part of the cept as it is connected lby the spring n or n with the supporting perforated head.

One or more of the intensifiers may be used as desirable to produce the proper tone. Preferably I use two. The auxiliary horn 7c or le is formed byI a diaphragm Z or Z attached by a soft ring or substance m or m', to a horn or funnel shaped piece.

have found by inserting these chambers of the clariliers in the passage of the horn so that the Waves of sound pass through the chambers of the clarifier c, as b, b and Z9, with some of the perforations of the diaphragm thereof, a?, e, d', c', staggered or placed alternately with each other, a very softening effect is produced upon the sounds reproduced by the record; By placing in the horn a perforated diaphragm as consists of a supporting g, with a sounding diaphragm z', attached b a spring connection to a 'second diahragm Z, of. an auxiliary horn 7c, I have fbund that it greatly softens and intensifies the desiredptones of the phonograph.

By the use of the clarifier and one or more intensifiers the scratch and squeak sound of a needleon the record is. eliminated and the finer and more perfect tone of the desired sound is reserved. U

What claim'is: '1. The combination with a. phonograph horn of a sound modifier comprlsing a perforated head, a centrally supported diaphragm, an auxiliary horn and a spring connection between they forming a resilient auxiliary horn and the head.

2. The combination with a phonograph horn of a sound modifier comprising a perforated head, a sound diaphragm arranged at one side of the perforated head, an auxiliary horn located'at the perforated head and a spring connection between the head and the diaphragm and the auxiliary horn.

opposite side of the 3. The combination with a phonograph horn, of a plurality of sound modifiers 1nserted in the phonograph horn and successively increasing in size With the increasing diameter of the horn, said modifiers being provided with a centrally suspending diaphragm and having a yieldably mounted oscillatory horn provided with a diaphram.

4. he combination with a. phonograph horn, of a elariier comprising a cylindrical 10 body 'spaced from the walls of the horn and provided with a plurality of transverse the interior of the horn and provided with 15 apertures.

HARRY C. STAGEMAN. Witnesses:

ERNEST G. LLOYD, Bassin K. GUINNEE. 

